Features of technical requirements for operational properties automotive engine oils in new specifications

Особенности технических требований к эксплуатационным свойствам автомобильных моторных масел в новых спецификациях


УДК 621.43:621.892

V. A. Zolotov

(FAE «The 25th State Research Institute of Chemmotology of Ministry of Defense of the Russian Federation», Moscow)

Keywords: automotive motor oils, performance properties, specification, method of test, engine, fuel economy, exhaust emissions.

Abstract. Analytical information on the state of the art in the development and implementation of new foreign requirements in the specifications for motor oils for serial and future automobile engines, taking into account global trends in environmental protection, is presented.

Global technical requirements for the level of properties of engine oils are traditionally improved, both in the direction of meeting the design features of new engines and their operating conditions. For example, the market for motor oils for automotive diesel engines is gradually moving to products with lower kinematic viscosity with the advancement of the advantages of new technologies, which makes them more accessible for use by truck fleets.

Over the past decades, engine oils with viscosity grades 15W-40 according to SAE (Society of Automotive Engineers — SAE) in the heavy truck market and 10W-30 according to SAE in the passenger car market have been the main ones. More recently, there has been a transition to truck operation on SAE 10W-30 viscosity grades, and a trend has gradually emerged towards the use of the latest category of engine oils for diesel engines FA-4 API (American Petroleum Institute — API) with a lower viscosity. Currently, the demand is shifting towards low-viscosity oils that meet the three needs of diesel engines for trucks [1].